[PATCH v3 07/13] vfs_btrfs: add [GET/SET]_COMPRESSION handlers

Volker Lendecke Volker.Lendecke at SerNet.DE
Tue Nov 5 06:01:52 MST 2013


On Tue, Nov 05, 2013 at 01:59:55PM +0100, David Disseldorp wrote:
> On Tue, 5 Nov 2013 13:40:16 +0100
> Volker Lendecke <Volker.Lendecke at SerNet.DE> wrote:
> 
> > > +	ret = ioctl(fd, FS_IOC_SETFLAGS, &flags);  
> > 
> > Is this call sync, i.e. does it block until that 1TB archive
> > is compressed?
> 
> No, on Btrfs it flags the inode for compression of newly written data.
> I.e. It's a meta-data only operation.

Thanks!

Volker

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